    package com.linkage.jz.bankruptcy.activity;
    
    import android.app.DownloadManager;
    import android.app.DownloadManager.Request;
    import android.content.Intent;
    import android.database.ContentObserver;
    import android.database.Cursor;
    import android.net.Uri;
    import android.os.Bundle;
    import android.os.Environment;
    import android.os.Handler;
    import android.support.annotation.Nullable;
    import android.support.v7.app.AppCompatActivity;
    import android.text.TextUtils;
    import android.util.Log;
    import android.view.View;
    import android.view.ViewGroup.LayoutParams;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.LinearLayout;
    import android.widget.ProgressBar;
    import android.widget.RelativeLayout;

    import com.linkage.jz.bankruptcy.R;

    public class MainbakActivity extends AppCompatActivity {


    }